Principal Instrument Engineer


Petrofac is seeking a Principal Instrument Engineer – Contractor for 12 months based in Aberdeen, UK.

The role is outside IR35 and we invite Limited Companies to engage.

Scope of Services:

  • Provide engineering input to estimates for project work scopes¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†
  • Provide input to progress and planning meetings¬†¬†¬†¬†
  • Provide technical expertise to specify modifications to existing equipment or purchasing new equipment including but not limited to:¬†
  • DCS, ESD F&G and Metering system modifications
  • Field Instrumentation including Pressure, Level, Temperature, Flow and Specialist Measurements.
  • Valves
  • SIL, High Integrity Systems (HIPPS)
  • Measurement and Metering
  • Industrial Networking and Communications¬†


  • Provide technical expertise to the resolution of technical queries ensuring¬†that all design changes are captured by the change control process¬†¬†¬†¬†¬†¬†¬†¬†¬†
  • To be able to conduct site surveys¬†on offshore or onshore assets¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†
  • To be able to produce calculations required for the role and participate in design reviews¬†
  • Provide¬†checking¬†and approval of¬†discipline¬†documents;¬†complete¬†interdisciplinary¬†checking of¬†documents where necessary¬†¬†¬†¬†¬†¬†¬†¬†
  • Production of¬†discipline¬†documentation deliverables for inclusion in¬†work packs¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†
  • Provide a level of technical support that satisfies the appropriate Asset Safety Case and that the PFEER performance standards¬†ensuring they¬†are not compromised by any¬†discipline¬†engineering¬†activities¬†
  • Compliance with company engineering procedures, industry, international and client codes and standards¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†
  • Ensure that all work complies with the Contract Health, Safety, Environmental and Quality¬†policies¬†and procedures as appropriate.¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†
  • Approve dispensations to codes or standards¬†where¬†justified¬†



  • Control system philosophy and¬†Software scopes of Work¬† ¬†
  • Specifications ¬†
  • Vendor Statement of Requirements¬†¬†
  • Preparation & Issue of Survey Reports¬†
  • PEPs¬†
  • Instrument and I/O Schedules ¬†
  • Instrument / Equip / JB / IO / Alarm Schedule¬†
  • Label Schedules ¬†
  • Orifice Plate / Valve /IS/Cable¬†and¬†General¬†Calculations¬†
  • Equipment Data Sheets¬†
  • Requisition (Including SDRL)¬†
  • SIL Assessment ¬†
  • Spares/Equipment List¬†
  • Weight control¬†sheets¬†
  • MELS and MDRS¬†
  • Workpack¬†input¬†¬†


Design deliverables to check:

  • Block Diagrams¬†or Single line diagrams ¬†
  • Cause & Effect Diagrams¬†
  • Instrument¬†Cable Block Diagram ¬†
  • Cable Tray Routing & Layout¬†Diagrams¬† ¬†
  • Panel;¬†Control Room; F&G and Equipment Room¬†Layouts ¬†
  • Panel Wiring Diagram¬†
  • Destruct Drawing ¬†
  • Instrument Mounting / Support Details¬†
  • Logic¬†& Loop¬†Diagrams¬†
  • Schematic Diagrams ¬†
  • Cable Interconnection Diagrams ¬†
  • Cable; Panel & Junction box¬†Termination Diagram ¬†
  • Junction Box Termination Diagram ¬†
  • Pneumatic; Chemical and Hydraulic¬†Hook-up Diagram ¬†
  • Pneumatic; Chemical and Hydraulic¬†Hook-up Schematic¬†
  • Installation or story board diagrams to facilitate understanding¬† ¬†
  • Cable Schedule ¬†
  • Requisition – Bulk Bill of Materials¬†

Additional Information

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